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Employee Benefit Plans and Similar Obligations - Additional Information (Detail)
$ / shares in Units, shares in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Apr. 30, 2024
$ / shares
Apr. 30, 2024
shares
Dec. 31, 2024
USD ($)
shares
$ / shares
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Top of range [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Percentage contribution to mutual fund retirement plan     10.00%    
Bottom of range [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Percentage contribution to mutual fund retirement plan     3.00%    
Plan 2019-2022 [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Share-based benefit plan validity period     3 years    
Share-based benefit plan grant date     July 1, 2019    
Description of maximum term of options granted for share-based payment arrangement     3 years    
Plan 2020-2023 [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Share-based benefit plan validity period     3 years    
Share-based benefit plan grant date     July 1, 2020    
Description of maximum term of options granted for share-based payment arrangement     3 years    
Plan 2021-2024 [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Share-based benefit plan validity period     3 years    
Share-based benefit plan grant date     July 1, 2021    
Number of share options granted in share-based payment arrangement       50,037  
Description of maximum term of options granted for share-based payment arrangement     3 years    
Plan 2022-2025 [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Share-based benefit plan validity period     3 years    
Number of share options granted in share-based payment arrangement     890 69,176 962,150
Description of maximum term of options granted for share-based payment arrangement     3 years    
Plan 2023 - 2026 [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Share-based benefit plan validity period     3 years    
Share-based benefit plan grant date     August 1, 2023    
Number of share options granted in share-based payment arrangement     48,785 778,756  
Description of maximum term of options granted for share-based payment arrangement     3 years    
Plan 2024 - 2027 [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Share-based benefit plan validity period     3 years    
Share-based benefit plan grant date     August 1, 2024    
Description of maximum term of options granted for share-based payment arrangement     3 years    
Value Generation Plan [Member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Share-based benefit plan validity period The PSARs expire five years after their grant and begin to vest in the third year, subject to the fulfillment of certain conditions, including performance milestones related to the price of the Company’s common shares ranging from a minimum of US$ 30 per common share up to US$ 60 per common share.        
Number of share options granted in share-based payment arrangement | shares   4.6 4.6    
Description of maximum term of options granted for share-based payment arrangement The PSARs expire five years after their grant and begin to vest in the third year, subject to the fulfillment of certain conditions, including performance milestones related to the price of the Company’s common shares ranging from a minimum of US$ 30 per common share up to US$ 60 per common share.        
Weighted average share price $ 16.17   $ 28.6    
Weighted average remaining contractual life of outstanding share options 3 years        
Weighted average exercise price of share options granted in share-based payment arrangement $ 8.75        
Expense from share-based payment transactions | $     $ 33    
Value Generation Plan [Member] | Top of range [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Weighted average share price 60        
Value Generation Plan [Member] | Bottom of range [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Weighted average share price $ 30        
Retirement Plan [member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Total charges | $     4 $ 3 $ 4
Performance Bonus Programs and Performance Evaluation [Member]          
Disclosure Of Employee Benefit Plans And Similar Obligations [Line Items]          
Total charges | $     $ 154 $ 111 $ 122